Question

How do we calculate the value of IC in the hybrid-pi CE transistor model?

(a) IC = hre × IB

(b) IC = -hre × IB

(c) IC = hfe × IB

(d) IC = -hfe × IB

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This interesting question is from The Hybrid PI CE Transistor Model topic in portion High Frequency Transistor of Electronic Devices & Circuits

Answer 1

The correct answer is (c) IC = hfe × IB

Explanation: The collector current of a common emitter (CE) amplifier can be expressed in terms of hybrid parameters in the hybrid-pi CE transistor model. It is expressed as the product of hfe × IB . This is the same for approximate hybrid models as well.